From nobody Wed Dec 17 17:39:08 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54800C64ED4 for ; Thu, 17 Aug 2023 21:16:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355223AbjHQVPs (ORCPT ); Thu, 17 Aug 2023 17:15:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355196AbjHQVPe (ORCPT ); Thu, 17 Aug 2023 17:15:34 -0400 Received: from mail-pl1-x62a.google.com (mail-pl1-x62a.google.com [IPv6:2607:f8b0:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47B16358E for ; Thu, 17 Aug 2023 14:15:33 -0700 (PDT) Received: by mail-pl1-x62a.google.com with SMTP id d9443c01a7336-1bdb801c667so2210315ad.1 for ; Thu, 17 Aug 2023 14:15:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692306933; x=1692911733; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=8UofhjPFvRG631Ccgv2qHcV06RmLtv8X8B/5+W9lIA8=; b=TlEkdA0aHIpDhWACKGHLrkm5y9e4OB90g6PTzJ1l+cbGyrClX3h4fGqMnA+W3GTIHy lP+KdB7wLx+G2GYF76W564NATtk5HWp+4Rx8DoU5rzUBnYjtV1BE+7EJ2YTSjwpgYMph +5OXcqEe8DeO2ald44h2rUXsRTA4LQAQWdiso= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692306933; x=1692911733; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=8UofhjPFvRG631Ccgv2qHcV06RmLtv8X8B/5+W9lIA8=; b=hEW3wkuhZxo+/C1F9pFGggP+7X62i+0wK6Lv6e0QSJUss8aExZaIyQqQxROA/ZdReN ZpqFuO97BqsVWrSmE9FBbCpYNDHTZXIGInWHbv/C0tf23wT1OQRBs0+D2aoU6SD2NbY7 dwe2p58SM+NrCYeCXiwMDU+3eC8KqvTehIEbPxRO5pz8Rh24sBlouIEIbqATbOev2caQ EIRaHTCc4645rMf9hs0L5SgRT99ZkmZasw77ZLxiVQuYBLRUkH2fwDrUzUICbOA3vm4b 07eVoylO+25yksnI+Z9sRLyGluA/2OkmulVU4mCOlCAjQQzNVsJLWsSl7LvnB9j+dcDV 3Lyw== X-Gm-Message-State: AOJu0YxPuhKdQbxFzWrk1zUJXiCX61Lmqm5ci8XqHqMW2f0vg2SJrE8O MLpMHURjlMqCTgkd7WazhF6xmg== X-Google-Smtp-Source: AGHT+IFBZSHNzPvyZlBzEtJLJA9BTz4aD5fj9A34rHRZOf7eSuRvseMrGYRyhAolhTW3rZ+WlLEk7w== X-Received: by 2002:a17:902:bd45:b0:1bb:cf4e:ccd with SMTP id b5-20020a170902bd4500b001bbcf4e0ccdmr659710plx.28.1692306932698; Thu, 17 Aug 2023 14:15:32 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id x17-20020a170902ec9100b001bf35144a18sm110378plg.221.2023.08.17.14.15.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 14:15:32 -0700 (PDT) From: Kees Cook To: Johannes Berg Cc: Kees Cook , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 1/7] wifi: cfg80211: Annotate struct cfg80211_acl_data with __counted_by Date: Thu, 17 Aug 2023 14:15:23 -0700 Message-Id: <20230817211531.4193219-1-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817211114.never.208-kees@kernel.org> References: <20230817211114.never.208-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2104; i=keescook@chromium.org; h=from:subject; bh=HsEe1uS2p7u7BP7jBH38t6GAsv3eC9u8U8u9k4LTzrU=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3o3xUjzj9KXDcTFQvsN8IUNrW4GzDUUcLTOTR F6R3fE9BVaJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN6N8QAKCRCJcvTf3G3A JnzYD/0Z4jrC3Qoel0vy3g8ZrUKOYnJtNXSA5nwtWIj/WJ95o2nAw5Wff1y7uP0tXHAQ5QzlFeK 20SmedYHn+kj1uvTJ9++OVMMtOrTDd6LcBKdByskoSipgJo+bpwPNcNsiMVC3vMU8SlQ1U3dPOZ BRpQyecFwffX+Su5Ma7m86dMjcI6/nXrm5EIm0fZAyPYhyEG1zyT/J/eAgbL0YKVISQNO9ibybT Eklf8pHUlVduSjjwLcmiZfLYsrv1PHzybiHx9wQO0XEoVXCO8Gxt4Q7ZD7mOcrkKjkG4hOtyDi5 wkLn3BSk6LLpTrX9MX4TkhPLtZPKl+tdHSvxrvcjN1GzrJRAcMrClNRfjaR6Ay2JfQ6Xn7UC4vp DCygVQsJkaeGeQ1r7fFH6M0xfeORZqtRnmaBxSDI6q0RXDVdu5xv7BQ714R0gsNkcXh9vS8Wko1 5I9TUIDwHmobFmBmY0mw0GxI8Ni9en3PAjKZ7OroncsXcBRzTcC+sryyIONTsRjY2gIfV+bqgjv O8VqOlRAFVmMs0qXGLRaVWEo1Lcv2fmD0MqqjHoOFSpfO6/OYGLTKLSqfC26N8w2zi8U0KRcmLP wgh+mcdIpLnFW1fg6WtwoCbOuvmLYIMlmN381VG18LaUKFGiYEwo7gdcx2Rh2edzb2NaZ6p7LSZ tvcl7/UTEgnKl2Q== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cfg80211_acl_data. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Johannes Berg Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Jeff Johnson Reviewed-by: Justin Stitt --- include/net/cfg80211.h | 2 +- net/wireless/nl80211.c | 3 +-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index d6fa7c8767ad..eb73b5af5d04 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1282,7 +1282,7 @@ struct cfg80211_acl_data { int n_acl_entries; =20 /* Keep it last */ - struct mac_address mac_addrs[]; + struct mac_address mac_addrs[] __counted_by(n_acl_entries); }; =20 /** diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 8bcf8e293308..80633e815311 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -4889,13 +4889,12 @@ static struct cfg80211_acl_data *parse_acl_data(str= uct wiphy *wiphy, acl =3D kzalloc(struct_size(acl, mac_addrs, n_entries), GFP_KERNEL); if (!acl) return ERR_PTR(-ENOMEM); + acl->n_acl_entries =3D n_entries; =20 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) { memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN); i++; } - - acl->n_acl_entries =3D n_entries; acl->acl_policy =3D acl_policy; =20 return acl; --=20 2.34.1 From nobody Wed Dec 17 17:39:08 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0BFCC7112F for ; Thu, 17 Aug 2023 21:16:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355230AbjHQVPt (ORCPT ); Thu, 17 Aug 2023 17:15:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355201AbjHQVPf (ORCPT ); Thu, 17 Aug 2023 17:15:35 -0400 Received: from mail-pf1-x431.google.com (mail-pf1-x431.google.com [IPv6:2607:f8b0:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A5FEA3595 for ; Thu, 17 Aug 2023 14:15:33 -0700 (PDT) Received: by mail-pf1-x431.google.com with SMTP id d2e1a72fcca58-688769faa09so217105b3a.2 for ; Thu, 17 Aug 2023 14:15:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692306933; x=1692911733; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=zT8MJVDWHhlt7GT94EDDEs9nRzLXq6DEvQbiS8viRh4=; b=Q6MriGrKU+zV14wa941JOgTi+gqzhkkt96ee6lcGUbQWUgKDxi7fWotXu1zEoi0dcV jqZra5E71c8hTYDj7pB8tPmycyrXaDJ2/u2Bhx5f9cwSYQIFybzeAmmV1qmt2A2JPk5E EVl4teOZ6on0YKV7ZKC8M87jZ8aHd6LvixZdQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692306933; x=1692911733; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=zT8MJVDWHhlt7GT94EDDEs9nRzLXq6DEvQbiS8viRh4=; b=IfZmltBLds3oGZUIczwRqQlLVa7f0f7H1VaKGyUBwmZtku89Zr0P3FEzw2q9vB364r VHPO/WIKnTqNkbMccdR3EJFuUQjOoLs6j8PACosJFwo1ys+B6pHDrwl/647Xx7NjVmjv Wj5iVm05SlYZ9z9Ddq3pJNNePMW6VMNDDg769Ow8Jum6nvhsM4xPFxcBsbV4wWGWNzVM N+t3h6WGPAKT6hcTIWKzgWik9Tvs+3QjSorhJrMglESMBhQIuRkwW6U4P7OpFc4ODNeU 7zr34KivkHny9MqZPSbBB7MPWpejv+hFBMxWh5PX7LUmaGVBMYAjECF+opuhtBtpbWwm cRpw== X-Gm-Message-State: AOJu0YwP6BnpENEUTO0GBqng+b89jNmXhHwdW5SiPR6Fot1Y98Bbhx9/ 8Gs2K+coNHZFYs3UUDWhOLPIYA== X-Google-Smtp-Source: AGHT+IFujRQeDYqtEuwBg9LalW0yXT1bQy92TumTfAdEV+ffSYyXL9lBszK0H7i2rGqbhZ9NHX/HjQ== X-Received: by 2002:a05:6a21:7983:b0:147:c5e9:ac15 with SMTP id bh3-20020a056a21798300b00147c5e9ac15mr60162pzc.40.1692306933084; Thu, 17 Aug 2023 14:15:33 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id s10-20020a62e70a000000b0068895bf4cadsm199906pfh.114.2023.08.17.14.15.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 14:15:32 -0700 (PDT) From: Kees Cook To: Johannes Berg Cc: Kees Cook , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 2/7] wifi: cfg80211: Annotate struct cfg80211_cqm_config with __counted_by Date: Thu, 17 Aug 2023 14:15:24 -0700 Message-Id: <20230817211531.4193219-2-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817211114.never.208-kees@kernel.org> References: <20230817211114.never.208-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1344; i=keescook@chromium.org; h=from:subject; bh=ECnIXt7JV7ajMGIel3HODpAmzQ0rNDyrgZa+BQq/MjM=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3o3xJTj0RQBtpGsyr25lmRq+X7daHGy0fxY9d iHi9VLtuYOJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN6N8QAKCRCJcvTf3G3A Js23EACoJ3Il4Fox1qfv6MkF00FIjkgz3oRYETXrnXwRExjX9UgOxj0O8a+o0WKYAqsu77C5bkJ m8+EutF4wdDbNNnYQiT003irtBsaAPzt5XKeo2uvuWQqnhuR8Vn7nPrwdbr3YUu/GLFZcMCGMEE j5Pu9mUcyP1xpOYW/qA07g0FnxfO6B9AC9wIJ9cjpLGgZS7VJGcj6jtLSffl+bg2mCP7BfFpEcm KL2L0tc5486Y+0rnUbnUMHuI7Ulrkp2JnJglnXF7NCWdBXb7y2Lm4Zt8JV5pKmjOujBupvod0Ch /y7CnDi8b+SUAOi+Y+w9EqAj+tXOAa4xiUXgbvpsBQ4JkeTPSOnlA0iBRnj6m3tSHQCpkgPuwgg vSL7a6TIEza+DbAMt1tYrqPrDMJWhcmTgUleo+rZAb4tYnaoV6rdx+cHKPHTAHhA94GLnqL9k9U h2xBix7EEIE6fvqapgClnLk/Vw1gBIBKEPhzEUhwFq+VOVJ2WwVc3lxnY8rGtri+K60mNSESqQt IeoITB7eL74K4VO/zVj9MOGV9e7wSb9maD5ekrpESQt3fg2nNVAhi8YBq+lF7D+iwpq33YNiqgE 7Z16srA65hfN1L+0QSKUbaM8loMTw4re3KKImg7iygQngjXSXVFTJGF9EIaX2yAkQ5hz+/1bfib 9VA99TlaYkEOXRg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cfg80211_cqm_confi= g. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Johannes Berg Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Jeff Johnson --- net/wireless/core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/wireless/core.h b/net/wireless/core.h index 8a807b609ef7..507d184b8b40 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -298,7 +298,7 @@ struct cfg80211_cqm_config { u32 rssi_hyst; s32 last_rssi_event_value; int n_rssi_thresholds; - s32 rssi_thresholds[]; + s32 rssi_thresholds[] __counted_by(n_rssi_thresholds); }; =20 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); --=20 2.34.1 From nobody Wed Dec 17 17:39:08 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B715C6FD22 for ; Thu, 17 Aug 2023 21:16:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355212AbjHQVPu (ORCPT ); Thu, 17 Aug 2023 17:15:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355202AbjHQVPg (ORCPT ); Thu, 17 Aug 2023 17:15:36 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A0AD535A9 for ; Thu, 17 Aug 2023 14:15:34 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id d9443c01a7336-1bda9207132so2280955ad.0 for ; Thu, 17 Aug 2023 14:15:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692306934; x=1692911734; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=84126Krvj5It4jg9Q1uPzC9d5K5UntVoSjqBC8dGf2s=; b=BHz4qEOXdw40B8x8sOfWFvsckDK4ZpX1DduLsCtYUeDJHrXqjzAF9zFyUz0yA9PTh2 eC/nGE41cN98MhDYLXv7g4Hg0mURamg+YmSIGtq1u4M3cEsm6Mlpm/buNulzWU+ZJe/K QrlwgfN8fE+5xgreRerXYyu0HuOHuVQC19cQI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692306934; x=1692911734; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=84126Krvj5It4jg9Q1uPzC9d5K5UntVoSjqBC8dGf2s=; b=MXmFP+QwLgIl80AJW5TtouL5LM7zsA5BKY7vi6oKbmr3YZ7bPapg7l3YgjfuHVuTNM lOQCg3m2SDKsKTZlGRIGq9dJYQa+kTdlqh3AnXXioLDN78I92pyydnAziW97RoYrARNx kXdV13RnxrxGP8InrNkeEyYD4KwiN3m/bwApPNlYNN+Ou7jEPY6jgiAu4axk/yJX2qPG NHDlTVKw9VhWOmuH7WPMGLWnlKTrVVCjBPW5lUJA/oCxbUoZg+KgzIVhp8TJDg7peWBI eOAwyiS6MvllvNhLvVIIipEPLNwADz8fVZ3aaNjq+AL0dmImUGCL+/B/57b9KOGj7jit UXFw== X-Gm-Message-State: AOJu0YznBP3v1W2ZS52mC7KEeK9sQFRdcFJWJwyl8SH50MM5p1svdT12 XIut10ENvx/SoJk947oFx3pVLQ== X-Google-Smtp-Source: AGHT+IGejMpNDu5iUt5y4pkNg7hjNXDzs6GU7LUwzlDmA1AYeMtiV3uVhEVENEVbaoaSlRg1FcsTxA== X-Received: by 2002:a17:902:f54f:b0:1b8:6987:de84 with SMTP id h15-20020a170902f54f00b001b86987de84mr625512plf.48.1692306934091; Thu, 17 Aug 2023 14:15:34 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id u12-20020a17090282cc00b001b8943b37a5sm223595plz.24.2023.08.17.14.15.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 14:15:32 -0700 (PDT) From: Kees Cook To: Johannes Berg Cc: Kees Cook , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 3/7] wifi: cfg80211: Annotate struct cfg80211_mbssid_elems with __counted_by Date: Thu, 17 Aug 2023 14:15:25 -0700 Message-Id: <20230817211531.4193219-3-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817211114.never.208-kees@kernel.org> References: <20230817211114.never.208-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2022; i=keescook@chromium.org; h=from:subject; bh=vaWHXmxPO1ptoIqyZPI0oaQtbTFkYHcNqPSrVLO+Cyo=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3o3x9Q72AWeO3iT9FoMZtrv2vw6MyWouRB7nh h1x+UnGyeSJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN6N8QAKCRCJcvTf3G3A JrUyEACKeu7bZ+6W17+6Csyy59kutbcaGWnWoZqfeNWCSYd8tAVhCczdJLuz9/B0R2QrXSpwu5n zpIIYGWYvFW7QaNN3Ygc4s35ySoSg3owW7TtTyaCr7IXyJoJ1XjqboBhARy1m1Xf2omjbw68BMf 7E2D+pVCSVklqLPDnXGQGvI+wuRpG+nlQMh+MkQ7gbU4cE+qrDf2VGKADgzzqFCCtNjsOsm02ho R3Fh6czL/VlwYTGdoI/cmyNjZVZkxHLTxOQvl+18zGC/2AbLsX7QRbFN0Qt5ky6gUa0PTo2fW3e Z2tQLZDcpZhxgLxNp9sF9eKAfzzQoT5V5oxZ4oXka86BlvZR6b+OgYyFq75wNqabtdhPK02OTmY trw7lr+vgki7yU+3+OErnwg0WAMENH7zVcC4WcnpIxwTxaVBM4oFEhytGPLPfNGyfXfUPT5JRen ygp8TcPbp1bgT6ITfxI+mP3vMVDrZy0w+385fFnq9xUyJYou6HIOzlr3PXaP0Ya82tLq4T4cKoF xOsW6OcFPLf2zsF2H/IvlbgWExJEV3XI0eIz7UXg1axO1xs3z76pyLB1ZwRuOxepVQ9hP2jHT69 3ihSRWYcbD7XS8UeaSsUR6HfR1YBJrG6hgR0zJDcMztj7DCNSiWrE2eolF9mGGG381h9598oL6j wLHKdDJFXPjvMAQ== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cfg80211_mbssid_el= ems. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Johannes Berg Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Jeff Johnson --- include/net/cfg80211.h | 2 +- net/wireless/nl80211.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index eb73b5af5d04..5c7d091b3925 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1187,7 +1187,7 @@ struct cfg80211_mbssid_elems { struct { const u8 *data; size_t len; - } elem[]; + } elem[] __counted_by(cnt); }; =20 /** diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 80633e815311..9ba4266368db 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5438,13 +5438,13 @@ nl80211_parse_mbssid_elems(struct wiphy *wiphy, str= uct nlattr *attrs) elems =3D kzalloc(struct_size(elems, elem, num_elems), GFP_KERNEL); if (!elems) return ERR_PTR(-ENOMEM); + elems->cnt =3D num_elems; =20 nla_for_each_nested(nl_elems, attrs, rem_elems) { elems->elem[i].data =3D nla_data(nl_elems); elems->elem[i].len =3D nla_len(nl_elems); i++; } - elems->cnt =3D num_elems; return elems; } =20 --=20 2.34.1 From nobody Wed Dec 17 17:39:08 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42291C71132 for ; Thu, 17 Aug 2023 21:16:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355244AbjHQVPw (ORCPT ); Thu, 17 Aug 2023 17:15:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355207AbjHQVPh (ORCPT ); Thu, 17 Aug 2023 17:15:37 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 000BD35B3 for ; Thu, 17 Aug 2023 14:15:34 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1bf092a16c9so2312165ad.0 for ; Thu, 17 Aug 2023 14:15:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692306934; x=1692911734; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=A6pRzVAL1HfaFk+MrN35IOTXl1yUajrA5beAIZxFLLg=; b=MyltMusNWYrHHduM59ZY3KVk2F109y3Pp1ImvclhC5uVVFlNLd85wpLi5oUy/yS5VG ZFFcJApAMPM4nChjoYVKU7Y6Oh7sZaTnMWVh6YYIKI0/wWuJfWBrRxdnsHBmTTqccdY7 /Ns8/4aEaQBWWwnFK+vLM7Ur9D5iHCixdohfk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692306934; x=1692911734; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=A6pRzVAL1HfaFk+MrN35IOTXl1yUajrA5beAIZxFLLg=; b=YMhh1LyOy/KjJZr5LRthDv0yPMrvI/+3Fe1yLWOhbU+zxosJfDejScYPpwN5QxN5rZ raEKP9cSAk0t9G5D3xuNgGdqD97qIJfs06AUD2AYiA2gZuo7vNc0W5L5u7Sxk1RBRd/T NQq+AXEYYGNKQk6Udc3b9VpgOHvDZC2Mou6g6zA5s8/zXELkzRKlSpBZuAIfdzQtTxrg QOloqKrF8HYppO5wBmPbJ3KQY271s00CXVv9QdHEZjRfHttjGtPxIdDscYm93haf6wZM xj2KadLDygV0iDILZLQ5Vn/ePoNt1X6EO/S4i+OnB4Bm2QSQ9OlgU++fcT6hfEwLZQdz L/ug== X-Gm-Message-State: AOJu0YyDwDKgoIfFGolJe6oauS9EBQQkJBaS/BS6j7XDIqAbnrz8CU7M HHTcXbtrEE09ar5fVpXg6DeqSQ== X-Google-Smtp-Source: AGHT+IHVjuRk1web/N5CIE6G3DSroLocgLnvFFM3Lfkq6agT4XiyPHhqIHZks3sie+eRrw9Rg6gakw== X-Received: by 2002:a17:902:be03:b0:1bd:e85f:700e with SMTP id r3-20020a170902be0300b001bde85f700emr590833pls.69.1692306934435; Thu, 17 Aug 2023 14:15:34 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id jj20-20020a170903049400b001b9f7bc3e77sm208556plb.189.2023.08.17.14.15.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 14:15:32 -0700 (PDT) From: Kees Cook To: Johannes Berg Cc: Kees Cook , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 4/7] wifi: cfg80211: Annotate struct cfg80211_pmsr_request with __counted_by Date: Thu, 17 Aug 2023 14:15:26 -0700 Message-Id: <20230817211531.4193219-4-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817211114.never.208-kees@kernel.org> References: <20230817211114.never.208-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2180; i=keescook@chromium.org; h=from:subject; bh=ytZuVuu89ZLCBsGHGYeK5Mrw8+wpGzwhqHz7UbWnFA8=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3o3x/0j3Sg2xlp/sAxt3CMimE1sDR90HXUPBB lc5GQBuZSuJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN6N8QAKCRCJcvTf3G3A JnDCEACQDuHi5umP6pnbV1/6oqKWEuBYmNo/ZvDgqxNNQUELDL5Ta/5wtzf7XiiCeoll8eOLUCi P7ReHnkR5v3TpE40/l08pqvVD0Uhy7syN+4izs7Z/I2Tj6P9F7QPf1eIz9o+DGg+BoXpIz7+anZ deuiv+CQBw/qR3n+4ZutHmcdrJ6VXv7JPMxjVlKnPlKZ14LELqAVNYpqRb7GVT9mtCWYSUCzI/o q7pc8sXhIiGvqbhGEH1DHBwUsDaCJFyZU0deQ/4Wr6PjJmzm6VwT1/tCLXsJSOc/Bm0dZnJ50tF CrXF9Lu0muoI54sFAZ2aObdmUdx9cRs7vLwLMPMpORFSToSzsYuxcmfoe139MigExg96t0sqMjr 15BXehaTyC/b1xov42tJ+E86o2aphkoRQy/CJfb+41Ab6Kxd881kUk5U5AQDaEzwFxO70DgRF9i AIBAQRxAKLNJiH/KfcqZ+dBL3eZFLiSraO9F/WymXLqEq+VLYAFI0NzWsbLSyYAxYakd3yyqocD rama7ffqboYN4fv1HznzYuerAjJ40SUp7OYKWNCrjOenDPT+r7wkghCV4iXQMjc7EOpL3oHq35H Lwq8T6EDWTvsH0OISgIGkXmXOFRctDiRJ1qka4z9zeAyOBEMvT3kscRRH+5HmFH3PAQoLms2mF6 tAQgs/hfx8leeZg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cfg80211_pmsr_requ= est. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Johannes Berg Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Jeff Johnson --- include/net/cfg80211.h | 2 +- net/wireless/pmsr.c | 3 +-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 5c7d091b3925..e9ca4726a732 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -3948,7 +3948,7 @@ struct cfg80211_pmsr_request { =20 struct list_head list; =20 - struct cfg80211_pmsr_request_peer peers[]; + struct cfg80211_pmsr_request_peer peers[] __counted_by(n_peers); }; =20 /** diff --git a/net/wireless/pmsr.c b/net/wireless/pmsr.c index 77000a264855..9611aa0bd051 100644 --- a/net/wireless/pmsr.c +++ b/net/wireless/pmsr.c @@ -291,6 +291,7 @@ int nl80211_pmsr_start(struct sk_buff *skb, struct genl= _info *info) req =3D kzalloc(struct_size(req, peers, count), GFP_KERNEL); if (!req) return -ENOMEM; + req->n_peers =3D count; =20 if (info->attrs[NL80211_ATTR_TIMEOUT]) req->timeout =3D nla_get_u32(info->attrs[NL80211_ATTR_TIMEOUT]); @@ -321,8 +322,6 @@ int nl80211_pmsr_start(struct sk_buff *skb, struct genl= _info *info) goto out_err; idx++; } - - req->n_peers =3D count; req->cookie =3D cfg80211_assign_cookie(rdev); req->nl_portid =3D info->snd_portid; =20 --=20 2.34.1 From nobody Wed Dec 17 17:39:08 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13B14C64EB4 for ; Thu, 17 Aug 2023 21:16:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355260AbjHQVP4 (ORCPT ); Thu, 17 Aug 2023 17:15:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355215AbjHQVPj (ORCPT ); Thu, 17 Aug 2023 17:15:39 -0400 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 393C43592 for ; Thu, 17 Aug 2023 14:15:37 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id d9443c01a7336-1bc0d39b52cso2073115ad.2 for ; Thu, 17 Aug 2023 14:15:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692306937; x=1692911737; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=h3KUIjH3bqO3vz9j7zL88Gi7VGzR7tpzI/DAuF67YiY=; b=kM2CV3yqnMQ3sAajAg0RjqmXfUnXkNE7pnTvtpPBHXQapPviKtWvfTryssx3R7OPUW kZY5hfjw60H8b94f7uX45reuNipK3U1jz0CjPV4GFJRQ08PzWPrONHjb5qqiXNMRHSDK ILrE9YOayY4VpZHZ/Rs8jIzUKjHArSNr289LY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692306937; x=1692911737; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=h3KUIjH3bqO3vz9j7zL88Gi7VGzR7tpzI/DAuF67YiY=; b=iX4QNu+GIt+rrWyk69bInWIew/k0LLsGsIHKF5Ki0rbb+kxyfENAccRC0+MGJ62/Qn RVwxIxDWpj+AcRlL8LWNuhYfnGj6bufVzEuSSj9eM69+aHhutiuB4v1WXexHcI8wsLdo u2E5ieu9m9fF/AJNOiJ0Dug5AaGJD5MQpv4FA8kEckEZb7tiO3hHVaOxJC4lORvJ+xOW O+U0ckziL2L5I848S2X6OpugWWMsuhvr52WzRSau8hdobRAnloK/2qxn7fTnh3uccGhS mFhCQ3WX63BzUbY4VumU+rwIs0XBDIrisg9scE+pJ4tMuL+mTXtmgI02zdOy9DLjzcmC WHuw== X-Gm-Message-State: AOJu0YxiScwasatn74eoqH6p1MD3IuVKlhPI8tyhzo7yg+5vaakfhP34 FmIeBzcrox4GAT9eNp3Sz+/jhg== X-Google-Smtp-Source: AGHT+IEmfNVsNy4iHnvmICXL9xQpKVCsS1m4JFbHTVsXD7ksfRQU/kKdfL0/USC58A0YU154Pq7AGg== X-Received: by 2002:a17:903:1250:b0:1b7:e646:4cc4 with SMTP id u16-20020a170903125000b001b7e6464cc4mr755667plh.28.1692306936691; Thu, 17 Aug 2023 14:15:36 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id n9-20020a170902e54900b001bde65894d5sm219283plf.109.2023.08.17.14.15.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 14:15:35 -0700 (PDT) From: Kees Cook To: Johannes Berg Cc: Kees Cook , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 5/7] wifi: cfg80211: Annotate struct cfg80211_rnr_elems with __counted_by Date: Thu, 17 Aug 2023 14:15:27 -0700 Message-Id: <20230817211531.4193219-5-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817211114.never.208-kees@kernel.org> References: <20230817211114.never.208-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2013; i=keescook@chromium.org; h=from:subject; bh=opTdchMTFBio49JAacuYDHOX8V17n+9BFsDugyXAN9E=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3o3xP3ljHbFTrWITJj5hyUq0mFHJdP46PaHR+ QMZ01hVNLqJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN6N8QAKCRCJcvTf3G3A Jhc3D/0fmSOg3r4qUmVXQBWBtynY0f5BSPE/uidL/PDaHslJN4zo0mvrc/HxB5KHuXE1PIu2rWY 0XvH+I5JZS8YV1NLW20Ngnr221VsBQ2U55gZ6ueSH51LejIR6Ugn51e+uPeBXY+Sq9lqmuvdONi ioVUed6O0963qupB6yUISWu4h0mift+ky7C6t2Tyrrqfan2O7JTKMmSniubu7UZ+ytA+ORDPp2G +ZJQ4ziYgEh5MAXRoSRovOxK5aRPI7JAN5K71Pnx9n6Lqvax4Qfx0fSyxQE2s8BP/ApwRtHyDR6 w1TjreEP7u9BA3a74LI1Sq8w3ECR/r/hLlijUCBUYzPKze8d7r7Agm9zMcSc/DQ1KcFu/vx3q4q vUIGXe/zSwPZhYwleRXNCgq710EA9chMYY3RtWCLJss6VxrkzVPg120TpzIOcREY5wj6zkAgR+s OJF55sKozzPob6ghUtHwn/LsiqSPjcxzDaY5lPPCEDF6ftxDRFdttZ+rO8fw+95XH5eBml2uw1t Uq+0dKigcSbaEgOmW1FZ2rQgTH9UQrO6nqrYO5ky/qMpq6rNembFzV8ZlEbEyVZhe4cobhuzi9i 6OuWS+FRM+KGsHfEWs+jTTqgZtGklRO0Jk8AygwNl1w3I6/bBzm97DbzVNzOCWStiY9rxVpzc7e FypPiEKQyAFJxEg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cfg80211_rnr_elems. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Johannes Berg Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Jeff Johnson --- include/net/cfg80211.h | 2 +- net/wireless/nl80211.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index e9ca4726a732..6efe216c01d2 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1204,7 +1204,7 @@ struct cfg80211_rnr_elems { struct { const u8 *data; size_t len; - } elem[]; + } elem[] __counted_by(cnt); }; =20 /** diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 9ba4266368db..0ffebf1a1eb6 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5470,13 +5470,13 @@ nl80211_parse_rnr_elems(struct wiphy *wiphy, struct= nlattr *attrs, elems =3D kzalloc(struct_size(elems, elem, num_elems), GFP_KERNEL); if (!elems) return ERR_PTR(-ENOMEM); + elems->cnt =3D num_elems; =20 nla_for_each_nested(nl_elems, attrs, rem_elems) { elems->elem[i].data =3D nla_data(nl_elems); elems->elem[i].len =3D nla_len(nl_elems); i++; } - elems->cnt =3D num_elems; return elems; } =20 --=20 2.34.1 From nobody Wed Dec 17 17:39:08 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25AF4C7113B for ; Thu, 17 Aug 2023 21:16:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355267AbjHQVP5 (ORCPT ); Thu, 17 Aug 2023 17:15:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54476 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355217AbjHQVPj (ORCPT ); Thu, 17 Aug 2023 17:15:39 -0400 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BFD4C3591 for ; Thu, 17 Aug 2023 14:15:38 -0700 (PDT) Received: by mail-pj1-x1029.google.com with SMTP id 98e67ed59e1d1-268299d5d9fso179801a91.1 for ; Thu, 17 Aug 2023 14:15:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692306938; x=1692911738; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=L1xDe42Zb4O1g25la6ZbpuaxP3YQAxL+qM/43yhn7u4=; b=aAnD+yQ6IXIXvqgfxPjHa3eQuh0LMSjOgvcikD2gU4WhmPjmZ5UKGdPLx9zVjdMWq/ htAwgtscCm+le+2XgzbGGyAu0u0v25DSSdxStSrMki6Vmy7v4V9iAZSwWRcg46VgRUC6 GBsKGsdXMR9I4jsHBGhPuW1cOm7H1PO49iZ0w= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692306938; x=1692911738; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=L1xDe42Zb4O1g25la6ZbpuaxP3YQAxL+qM/43yhn7u4=; b=GYroGJcsGb/7MUKel2kHsn/Vg9R85HIUEFzVuva7HfPEZqoZmFvDyZ5rZioaExCXwf lDHBHNWTSu8I6VDt8Gf7IXL3tgBSnGV+IYxQwUlwAvK9CqPAw8nce2e5A2YxMZYZ1q6y mRwtpNeeWMrBz9/cyos62KE3sjU5bu/sjDnr0VU7lRomp6x6a60Swb1wAv92rlEnpHHH 5Ag1E7H4ngXZzBTU4G3/KS4LckN1bu1aRJHfCg+C+bagLVM73RQdM1C7Ij97UEiSFaCb +jkWbGEjZLxcgRGJFcks7FRSnZBF9SmuQXvSK/ScMlq08KxTTP95sTVS6PNuxDE8d2Jt t7ow== X-Gm-Message-State: AOJu0Yy5F/kmZnnpEskn0fMVfAE27/nKQV0VNCPB0U8dG7bmteyjMwKo gY+b2kbl+3HWL0okVDuCr/8CMw== X-Google-Smtp-Source: AGHT+IFi8O0i9RK0CHXGKeQfJM6qFoojgbvsRcV1oh+MbrP9SdGULKDsRCDtwXu5ebU7gX5iSPej4A== X-Received: by 2002:a17:902:aa4a:b0:1b9:ea60:cd91 with SMTP id c10-20020a170902aa4a00b001b9ea60cd91mr614626plr.7.1692306938249; Thu, 17 Aug 2023 14:15:38 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id i4-20020a170902eb4400b001b531e8a000sm212760pli.157.2023.08.17.14.15.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 14:15:35 -0700 (PDT) From: Kees Cook To: Johannes Berg Cc: Kees Cook , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 6/7] wifi: cfg80211: Annotate struct cfg80211_scan_request with __counted_by Date: Thu, 17 Aug 2023 14:15:28 -0700 Message-Id: <20230817211531.4193219-6-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817211114.never.208-kees@kernel.org> References: <20230817211114.never.208-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1547; i=keescook@chromium.org; h=from:subject; bh=B1om6kzjnM+KYttPuLCv8qgp2sSo5I5ukw0vuIq7IR4=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3o3x6e3yCDOyg/CnRvaTxYnwKpLSGmq9jMXbu Lj6hWgVrwmJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN6N8QAKCRCJcvTf3G3A JuPqEACvZBjYWwE9vVsmWQaH0PScoxmrFrBmcCJVAXE9aU4a7P770PtzaGYD5I4idLwYuQstxsu hyy8i9VRnSI4ZhovMyvONu4Oa5vSGx30KKqu+EgYLel4gougy5ljNd62Ma1JJQwq/tl3Ib5VvtG b4/+4/CP1NIhwdhZGpdOCu9K6sbcBy/VllCKVkuohkOsR/LZWmQbOxapbM5l99ZKMlMtRi5Y4J6 ZyNkLPFv5UCoX0UNCoOwjIf8TX7Re1URAq6OK74mYIj2KLLBcQQb6WtzVhqlhEy69NV6s9mG4zw aN7Um7gzgf/969aG7t0K+Bg7sMaFVyl4Q5j2/ibGo3dLnxRjo8NcXeI7nFByEoZzCr0D1pLlnvE WyiFXEPJpE888qd74gajJKkFm/VVR8Aa+rcay3qko/HJACbC7MlDGKVmfbYWDentPVIeYfLpBAK 0zKQV4vVA+8Ni+4/N/CcXyEOVIoIEXU9gl3aOVSKME20mJd2/uEV+jkDQvzz3l2O3q3vg0iebeW oMZpUFHphqMXnfO+ecIAtyviIuuQ90a8AIu5ZFBzcnRmj44QZlSnICV33GdmCz1azq7xOUMe2Lg Nbedjr4+NY+tfEx20wxse70y+NoN5qmNSjxe027lWYKy1MuBHxZMamCWXthTi8bDNtm15bGhHWG GVGAyzyr9T5ndYg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cfg80211_scan_requ= est. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Johannes Berg Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Jeff Johnson --- include/net/cfg80211.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 6efe216c01d2..a2afc94a5408 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -2544,7 +2544,7 @@ struct cfg80211_scan_request { struct cfg80211_scan_6ghz_params *scan_6ghz_params; =20 /* keep last */ - struct ieee80211_channel *channels[]; + struct ieee80211_channel *channels[] __counted_by(n_channels); }; =20 static inline void get_random_mask_addr(u8 *buf, const u8 *addr, const u8 = *mask) --=20 2.34.1 From nobody Wed Dec 17 17:39:08 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 03B44C71133 for ; Thu, 17 Aug 2023 21:16:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355254AbjHQVPy (ORCPT ); Thu, 17 Aug 2023 17:15:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355213AbjHQVPj (ORCPT ); Thu, 17 Aug 2023 17:15:39 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7A073595 for ; Thu, 17 Aug 2023 14:15:37 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id 98e67ed59e1d1-26d1a17ce06so175007a91.0 for ; Thu, 17 Aug 2023 14:15:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692306937; x=1692911737; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=phUiJ93OG5fT2HQgeI0x27DBfVFvmCA05DOo5t8M3F0=; b=m13GfLSVElpoUlkc8XTfd2EAm/nFZIAFv5nYubhdAXg39AjnARc8PDqRRwhZ7nFuMl THmkcqR9SondynXpKqbAIqxO5ImaGw85uLzxTZpc/SMsVg7BpStQ00iERACf6w/Uaz1H +HeZJOIfHkfhzg2I/Y98/HcqNNILtGguIkQO8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692306937; x=1692911737; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=phUiJ93OG5fT2HQgeI0x27DBfVFvmCA05DOo5t8M3F0=; b=lQMwHjvNZ4nZnwF1LobvnXJ9+z9KOrCXaGslKaLuPIpEANq3CqDbJZ23SqeY0tMoO/ CQX4ugMjFn8j+Xjzqx6US/zniq6rfm6YqwmJUKzApeDDJcmi/nrMtq5cmj+TC2mF7wcs O/AkWZt1acx4EkJ9Q+XNupei071ezOYqIUWcVNhGQ9mloLLxfub4y4oT7wh1urOLzrk3 JxuAZKPZqOaGYeCbbxR0NJbqQvAATViFqr2xzvHA8LXQVVa4AmqEtgKjI/+BzNMUpfW2 fcFOKVhbVh7zVMG86V/mNo0qhKL9+PgaibGuNkzT+TtgAlPSgm3zMzCM+JWZds3jCdeT 5EYA== X-Gm-Message-State: AOJu0Yyp1RX0YF63t9mg4+opTQ+yeStobWQC13EdU2iaaXpDu6PX9/wL duTT86jC72bLaYcxdYNYCMJK+w== X-Google-Smtp-Source: AGHT+IF7s+IU/lIpVVTRfA7A1qbIsiivth3Da3IhciHPIQm6pnVUAKXy1L3JsiXrPdjKSQOIbfeQaw== X-Received: by 2002:a05:6a20:4420:b0:131:f504:a631 with SMTP id ce32-20020a056a20442000b00131f504a631mr1181516pzb.51.1692306937174; Thu, 17 Aug 2023 14:15:37 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id m18-20020aa78a12000000b00688701c3941sm197317pfa.111.2023.08.17.14.15.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 14:15:35 -0700 (PDT) From: Kees Cook To: Johannes Berg Cc: Kees Cook , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 7/7] wifi: cfg80211: Annotate struct cfg80211_tid_config with __counted_by Date: Thu, 17 Aug 2023 14:15:29 -0700 Message-Id: <20230817211531.4193219-7-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817211114.never.208-kees@kernel.org> References: <20230817211114.never.208-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1303; i=keescook@chromium.org; h=from:subject; bh=MqZgW0ZDJW9VKg5I69oHRlFrW/5s/bnzmd4geiRSuSA=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3o3x/34xyuHIsFO373KwVl2QODEFDIBSLz76F 4mS/Sq+pMaJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN6N8QAKCRCJcvTf3G3A JjEZEACO9GxRQKT9xf9tZlwDCcN6atAAOa0htPWNOoIsLNtvxWAYtKhtG8g1/ekxWwGhQF37YHo lJovHZ60rO+krmpUaxkVL5JglO/98U8OFfCt+Zm/XtjpwhrYgCk1rH4rBxQ05BFwiu3jDUK1rPx wrSqHb65i6piGqoNBN2P6KBm8E8+V25p2xE4fvwzJ/suiSSZoEWuK6HZYe6BIcIwQPAdT4JS1tW r8OEsiBL0pGU7Fnho3C2Qy1AuT42bVUTaS1PBVVDy830zM3Y39TqW7pWAD/N7mMNL36SVXXb/VY ujNzAglxUWExKIpLT5YouRtrrf7XBrJkOsZ9qEkj4JKqF9/iyQxhSopHsPuoOS8+cW8thVGuBDH z3scez2jr1rzzA1hPNKfOsmFMmJVIsQvgMERacrkLUXcnjkDdo9jsTn1zASB7NMYY4r4UjPz9cT m/vMQZpwV7/p9uZBhyBJrutEDl3b+ExnXiwukaJGKBRvhNznOEXbA9snzl3Vmjgijs4eELKywMM gfc4VntArWeYXia3LhmT2zLetKC0mrOBm/hHBTy6htJ0tG8Qkf+mYREzDm61HGSTZlDo6mwUzFk S88K7vNOHe5KjZ3/wUHPkbS28drKdo2jeZCveIDDJ0wNjY+Ih9FEGvjYYD8KY1lR5ZUMnQt6ovl gwCSNjN0bl2WPLQ== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cfg80211_tid_confi= g. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Johannes Berg Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Jeff Johnson --- include/net/cfg80211.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index a2afc94a5408..423fe9b85cb0 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -811,7 +811,7 @@ struct cfg80211_tid_cfg { struct cfg80211_tid_config { const u8 *peer; u32 n_tid_conf; - struct cfg80211_tid_cfg tid_conf[]; + struct cfg80211_tid_cfg tid_conf[] __counted_by(n_tid_conf); }; =20 /** --=20 2.34.1